![background image](http://html.mh-extra.com/html/cpi/gtr-50/gtr-50_service-manual_2675041005.webp)
CPI MOTOR
TROUBLE SHOOTING
GTR50
《
2-1
》
ENGINE WILL NOT START OR IS HARD TO START
PROBABLE
CAUSE
1
CHECK IF FUEL REACHES
CARBURETOR
FUEL REACHES
CARBURETOR
FUEL DOES NOT REACH
CARBURETOR
(1) NO FUEL IN TANK
(2) CLOGGED FUEL LINE BETWEEN
FUEL TANK AND CARBURETOR
(3) CLOGGED FUEL VALVE
(4) CLOGGED FUEL TANK CAP
BREATHER HOLE
2
REMOVE SPARK PLUG AND
TEST SPARK
GOOD SPARK
WEAK OR NO SPARK
(1) FAULTY OR FOULED PLUG
(2) FAULTY C.D.I.
(3) BROKEN OR SHORTED HIGH
TENSION CORD
(4) FAULTY IGNITION SWITCH
(5) INCORRECT IGNITION TIMING
3
TEST CYLINDER
COMPRESSION
NORMAL COMPRESSION
LOW COMPRESSION
(1) ENGINE NOT CRANKED
(2) NO VALVE CLEARANCE
(3) VALVE STUCK OPEN
(4) WORN CYLINDER AND PISTON
RINGS
(5) BLOWN CYLINDER HEAD GASKET
(6) FLAW IN CYLINDER HEAD
(7) INCORRECT VALVE TIMING
(8) BURNED VALVE
4
START ENGINE
ENGINE FIRES
ENGINE FIRES, BUT
DOES NOT START
(1) CHOKE VALVE OPEN
(2) CARBURETOR PILOT SCREW OPEN
(3) AIR LEAKING THROUGH IN TAKE
PIPE
(4) INCORRECT IGNITION TIMING
5
REMOVE SPARK PLUG
DRY PLUG
WET PLUG
(1) FLOODED CARBURETOR
(2) CHOKE VALVE CLOSED
6
START ENGINE WITH
CHOKE CLOSED